From a synagogue being vandalized to hate flyers being left at an Islamic center, the city of Alameda, Calif., has experienced a rash of hate crimes over the last couple of months. And now, another hate crime investigation has been opened after a noose was found on the grounds of Alameda High School on Tuesday afternoon.

The Alameda Unified School District informed the community about the noose via a Facebook page post:

AUSD has been informed by AHS administrators that a small noose was found tied to the external fence of the tennis courts on Encinal Avenue around 4 pm this afternoon. The noose was removed, and AHS administrators called APD, AUSD, and all AHS families. We have no other information about this at this time. We encourage and urge anyone witnessing such acts to report it immediately to school site administrators and APD so that we can investigate. A noose is a powerful symbol of intimidation. Please know that we denounce this kind of symbolic violence in the community. Our full statement is available on the AUSD home page.

The school district stated that there were no signs that the noose was left by students because the fence is also on public property that’s accessible by anyone. According to KTVU, police officials stated that the noose was made from the rope used to hold together the privacy curtains used at the school.

Alameda police requested that anyone with information about any of the hate crimes happening in the area call the authorities.